Electric sharpener or cutter



Aug' 22, 1950 A. soLLosY ETAL 2,520,020

ELECTRIC SHARPENER 0R CUTTER Filed March 4, 1947 2 Sheets-Sheet 1 .f ,Q 53 /3 44 T191 C- 35 34 l /2 27 //6 f 4@ 49 20 l \l f i L f I 47 |23 20 l /7\ 5| 22 Z/23:5 /7 /0/ J9 4h` 4242 /l/ [lll NVENTRS ARTHUR SULLUSY IRVINE MENDEL s DHH BY MW Aug 22, 1950 A. soLLosY ETAL 2,520,020

ELECTRIC SEARPENER oR CUTTER Filed 'March 4, 1947 2 sheets-sheet 2 INVENTRS ARTHUR EULL u SY IRVINE MENDEL s UHN TTRNEY `Patented ug. `22, 1950 UNITED STATES PATENT OFFICE ELECTRIC SHARPENER OR CUTTER Arthur Sollosy, Bridgeport, Conn., and Irving' Mendelsohn, Bronx, N. Y.

Application March 4, 1947, Serial No. 732,150

(Cl. 1Z0- 96) 4 Claims. l

llhis invention relates to new and useful improvements in electrically driven cutters or tools.

An object of the invention is to provide an electrically operated or driven cutter or tool device wherein the cutters or other tools are mounted directly in the armature of an electric motor.

Other objects and advantages of the invention will become apparent froma consideration of the following detailed description taken in connection with the accompanying drawings where-V in a satisfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of 'the appended claims.

In the drawings:

Fig. l is an isometric view showing one embodiment of the invention;

Fig. 2 is a top plan view of the device of Fig. l;

Fig. 3 is a sectional view taken as along the line 3-3 of Fig. 2 but showing the device on an enlarged scale;

Fig. 4 is a view taken as along the plane of the line ll-ll of Fig. 3

Fig. 5 is a plan View of the motor armature with the cutter blades therein;

Fig. 6 is an isometric view of a cover and bearing plate for the armature;

Fig. 'l is a plan view of one of the laminations forming the bottom bearing means for the armature;

Fig. 8 is a similar view of an intermediate lamination;

Fig 9 shows the two types of cutter blades involved; and

Fig. l0 shows a wiring diagram.

In the present instance, the invention is shown as incorporated in a pencil Sharpener of a type adapted to .be placed flat on a desk top or other support and to be shifted about as may be desired. However, we do not wish to limit ourselves to the embodiment or the incorporation of the invention in a pencil Sharpener as we contemplate other uses for the same. For eX- ample, we contemplate that the principles of the livention may be used in the head stock of a lathe with cutting tools mounted directly in the armature or with the armature mounting a chuck or the like. From this, it will be seen that the invention has rather wide application but in the present instance is illustrated in a pre ferred application as part of a pencil Sharpener 2 providing a pencil Sharpener of novel construction.

Referring in detail to the drawings, the pencil Sharpener generally designated I0 is shown as comprising a body and a cover or closure I 2, each of insulating material, as 0f any suitable plastic. The body l! is substantially hollow and in its lower portion is shown as receiving a drawer i3 adapted to receive the chips and the like resulting from a pencil sharpening operation. At any time, this drawer may be simply slid out of the body, emptied into a waste basket or the like, and then slid back in place in the body.

Above the drawer, a supporting device, as a bar or spider or the like i4, extends across the body and mounts a shaft l5 comprising a bot tom bearing for an armature I6 of an electric motor shown as including a pair of poles l'l. It will be apparent that the invention is not limited to the use of a two-pole motor. The armature l5 comprises a stack of laminations i8, each being somewhat in ring form but having four inwardly directed enlargements or bosses I9 each provided with a dove-tailed or tapered slot 20 receiving the thickened or butt portion of a blade 2i. Suflicient of the laminations I8 are used to provide a stack of the desired height and the blades 2l are each of a length equal to the height of the said stack.

Then, below the laminations I8 are a lesser stack of laminations 22 each also comprising a ring-like structure having four inwardly directed bosses 23. In the assembled armature, the

r bosses 23 of the laminations 22 are located immediately under the bosses I9 of the laminations I8 whereby the bosses 23 close the lower ends of the slots 2Q forming bottom supports for the blades 2l. Below the laminations 22 is a shal low stack of laminations 24 each provided with a center hole 25 and provided with a series of other holes 26.

The holes 25 of the stack of laminations 24 align and receive the upper end of the bearing stud l5 for the mounting of the lower end of the armature I6. In the use of the device, the holes 2S provide for the escape of chips and the like from the armature into the little drawer I3. Armature IB also includes a combined top plate and bearing member 21 shown in the form of a casting comprising a disc-like body portion and an upwardly extending neck 28.

All of the laminations and the top bearing member 2l are held in assembled relation Iby means of copper bars or wires 29 passing through 3 registering openings in the various laminations and in the combined top and bearing member 21. These openings in such top member are des` ignated 30 and in the laminations 22 are designated 3| and in the laminations 24 are designated 32, while in the main body of laminations they are designated 33.

The eld of the motor is mounted by the housing Il while theA armature at its lower end supported. on the cross piece orbar I4 and is `centered by the shaft l5, as previously explained. The cover or top l2 of the housing, at its undei-, side, is provided with a metal plate 3 4 having a downwardly extending annular flange or neck 35. The inner diameter of this neck 35 issuch as to receive the upwardly extending neck 2B of the armature top member 2f! and to, center and provide a bearing for the same. Thus; it will be seen that the plate 34 and particularly the annular ange 35 of said plate forms a top centering and bearing member for .the armature Iii. l

While the top l2 ci the casingmay be secured in any desired manner, it is here .as Vheld in place .by four bolts 36 passing upwardly through the corner portions of vthe'loody il threaded into thetop fromthe underside thereof. The cover l2 has .an opening 3l which aligns with a .central opening l3,8 .through -theplate 35S and with acentral opening 33 through'the necl: 28 of the armature top or cover plate. 'These aligned openings provide for the insertion'of an article, as for example, a pencil as A suggested by the dotted lines 4i? in Fig. 3, into the Sharpe ener tobeengagedbythe blades 2. i.

'.As willbe .clear from the several figures of the drawings, these blades arearranged at ,ninety degrees to one another, four blades being lillustrated, land at their adjacent edges the blades are: cut away or bevelled as at 4l so that looking from the side at any two blades, a deep .V .is formed. While four blades 2| are shown ,as mounted in the armature, it will bev clear that the invention is not limited te .such number. Additional rblades or lessblades maybe employed.

Clearly, the intermediate Ylaminations 22h0ld theblades againstdownward movement through the stack of the laminations i8 and the cover?? prevents-the blades working upwardly. "Thus, the'blades are held in the armatureand will be rotated with the latter. Therefore, ,afterthe motor is energized so that the ar-rnatureis rotating, .when la pencil is vinsertedthrough.the registering openings'Gl, 38 Yand I39, the .pencil will be engaged bythe bladesY and pointed.

Three `oi thev blades 2| vvhave their lower forward corner portionaremoved or omitted, as suggestedatiiZVwhilethe fourth blade comesdown toga point, as suggested-at d3. Thuawhen a pencilis inserted infthe 4Sharpener, all oftheblades (four being shown) nwill engage thepencilat a place beginning above the lower end .Qf-the pencil, that is, abovefthe leadof the pencil, and extending upwardly therefrom. The extreme lowerportion of `the pencil, thatis, the lead portion of the pencil, will beengaged only by Yoneof the blades, Vthat beingA the blade which extendsto the point-43. Thus, we have, aplurality of blades working on the wooden .portion of the pencil and buta single blade VJto `sharpenfthe lead .of the pencil' l If all of the blades were e.continuous VOrr-were not cut away as atZ, the vlead would Ybe 4con stanilv-.eeiirclvr remote@ and. sa success/fui Sharinening' .negation world be @reverie-e7 .iiisiii blades cut the pencil, the chips and the like fall down through the laminations i8 and 22 in the spaces between the bosses or enlargements I9 and 23 and then pass through the various openings 26 in the laminations 2li into the drawer I3. As a matter of convenience in handling the drawer, the latter is shown as being provided with a small handle or pull knob All.

Means are provided for vautomatically closing a lcircuit to the 'motor when' apncil is inserted to be sharpened. To this end, a hole is formed in or drilled through the cover l2 from one edge thereof and the hole partly enters the opening 3T. Then'a sphere, as the metal ball M5, is passed through this opening or hole @5 and partly entersthe passageway 0r @perline 3i- ',Ihereaiter, through an opening in the top wall of cover l2`,'a pair of contacts il and 4B are placed across the opening l5 in an elongated slot 49. The contact 3l engages the ball i3 and normally keeps it in position, projecting partly if@ the" passageway Si. The contact' 431s normally spaced from the Contactin.' A s shown, a cover piece coversthe slot throughwghiichi'the contacts lare passed for mounting in the cover i2.' Further, the outer end of the .hole 35, is shown'as closed byaplugi.

With reference i@ ibe- ,dieeram QI Fie- 10 wherein them-otor is vgenerally designated ,5.2, it win beffseri .that the' firltacis fil' and 4.8 er@ inclu-ded inthe 'motor Circuit When `iii@ Sharp? ener Ais to be used, the plug cap' 53 is connected with a suitable voutlet and the pencil sharpener is ready forfuse. Then, when a pencil is moved inidihe passageway 411i' eeeegeiihe .bali i6, as. the saine partly projects into said passageway, and iorces'the ,bail laterally bowing'the 'Contact' G7 to bring its point or'lug into engagement"with that of Contact 43 thereby closing' the `circuit tothelotorSZ.

The motor operates and its armature i6 revolves carrying the blades 2.1i to sharpenthe pencil. When the pencilv is removed from the passageway f3?, contact 'l springs-back tc normal position out of engagement with' contact A8 opening Ythemotor circuit and returning the vball i6 to normal position. Thus, theV motor is automatically dse-.energized but the Sharpener is ready for instant use on the insertion of a pencil into the eassaeewayi Having thus set forth the ,nature of our inventiomwhatwe ,Ciaimisl 1- .A11 armature for .use macerie@ ofthe-Gilaracter described, said armature comprising ya, body of laminaticns y each having a ,plurality of inwardly directed bosses having slots, the vbosses and. elo-is of .said iamiiiaiivns being aligned ,to form laminated slotted bosses, a cutter blade having a butt engagedin the slot of eachof said iamiriaiedsioiied bosses and having a @rejecting ,Cutting edeee-gioueof viarriiinii ii1s airone, sind of said body oflaminations andhaving b-,ossesiclosing the innerendsof the slots ofsaid laminated slotted bosses, a` third group of laminations atfthe outer side lof the second groupof laminations, said -larninations ofthe third group having an aligned. Ceeiiai Oriiiii'giiiefeihwiigh fOr-:tile ,r- ,Qeiiiiim Qfihgbcariiie Shafiand having .disagree openings ,about said central opening, a cover Piece. and @d bfeafieg member. against iii@ einer end of,said,bodyiof lamination's, and metalytiereds passing throughl all of saidlaminationsand said covenand end bearing-member and Secure ingall oisaidelements together.``

2l A n armature kfor use'in'adevice of the character described, said amature comprising a sub stantially ring-shaped body having a tool receiving slot extending along its inner wall surface between its upper and lower ends, ia tool having a butt engaged in said slot and having an inwardly projecting work performing portion, and retaining means secured at the upper and lower ends of said body closing the upper and lower ends of said slot to retain said tool therein.

3. An yarmature for use in a device of the character described, said armature comprising a substantially ring-shaped body having a tool receiving dove-tail slot, extending along its inner wall surface between its upper and lower ends, a tool having a dove-tail butt engaged in said slot and having an inwardly projecting work performing portion, and retaining means secured at the upper and lower ends of said body closing the upper and lower ends of said slot to retain said tool therein.

4. An armature for use in a device of the character described, said armature comprising a substantially ring-shaped laminated body having a tool receiving slot extending along its inner wall surface between its upper and lower ends, a tool having a butt engaged in said slot and having an inwardly projecting work performing portion, upper and lower plate members engaged with the upper and lower ends of said body closing the upper and lower ends of said slot to retain said tool therein, and tie rods connecting said 'plate members and passing through said laminated body.

ARTHUR SOLLOSY.

IRVING MENDELSOHN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,753,275 Narverud Apr. 8, 1930 1,887,843 Ludwig Nov. 15, 1932 2,208,911 Premo July 23, 194) 

